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A kind of modified polystyrene insulation material and preparation method thereof

A technology of polystyrene and thermal insulation materials, applied in the field of building materials, can solve the problems of reducing the strength and water absorption of EPS boards, and unfavorable applications of EPS boards

Active Publication Date: 2015-11-25
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of EPS board only melts the flame retardant and polystyrene particles and then makes the particles into foam molding, which greatly reduces the strength and water absorption of the EPS board, and its thermal conductivity is as high as 0.040w / m.k, not conducive to the application of EPS board

Method used

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  • A kind of modified polystyrene insulation material and preparation method thereof

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preparation example Construction

[0036] The invention provides a preparation method of a modified polystyrene insulation material, comprising the following steps:

[0037] a) mixing pre-expanded polystyrene particles with polyisocyanurate to obtain polystyrene wrapped with polyisocyanurate;

[0038] b) expanding and foaming the polystyrene wrapped with polyisocyanurate to obtain a modified polystyrene insulation material.

[0039] The invention mixes pre-foamed polystyrene particles with polyisocyanurate to obtain polystyrene wrapped with polyisocyanurate. Polyisocyanurate is wrapped on the surface of polystyrene, which enhances the cohesive force between polystyrene particles, thereby improving the strength of the obtained modified polystyrene insulation material. In the present invention, the mass ratio of polystyrene to polyisocyanurate is (1-10):1, preferably (2-8):1, more preferably (4-7):1.

[0040] In the present invention, the pre-expanded polystyrene particles are preferably mixed and reacted with ...

Embodiment 1

[0056] Add 100g of volatile polystyrene particles and 4g of n-pentane to a pre-expander at a pressure of 0.1MPa and a temperature of 70°C for pre-expansion, and obtain pre-expanded polystyrene particles after aging for 5 hours;

[0057] Then 40g of black and white polyisocyanurate material with a mass ratio of 1.8:1 is mixed evenly with the obtained pre-expanded polystyrene particles, so that the polyisocyanurate material is wrapped in the pre-expanded polystyrene particles s surface;

[0058] Put pre-expanded polystyrene particles wrapped with polyisocyanurate into a mold with a pressure of 0.2MPa and a temperature of 115°C for expansion and foaming, then cool to 90°C with water, and then vacuumize to a temperature of 80°C , demolded and then cut to obtain a polyisocyanurate modified EPS sheet.

[0059] According to the method recorded in the national standard "Polyisocyanurate Products for Thermal Insulation" with the standard number GB / T25997-2010, the present invention an...

Embodiment 2

[0061] Add 100g of expandable polystyrene particles and 10g of isopentane into a pre-expanding machine with a pressure of 0.3 MPa and a temperature of 90°C for pre-expansion, and obtain pre-expanded polystyrene particles after aging for 6 hours;

[0062] Then mix 30g of polyisocyanurate black and white polyisocyanurate material with a mass ratio of 1.5:1 and pre-expanded polystyrene particles evenly, so that the polyisocyanurate material is wrapped on the surface of pre-expanded polystyrene particles ;

[0063] Put the pre-expanded polystyrene particles wrapped with polyisocyanurate into a mold with a pressure of 1.0MPa and a temperature of 130°C for expansion and foaming, then cool to 90°C with water, and then vacuumize to a temperature of 80°C , demolded and then cut to obtain a polyisocyanurate modified EPS sheet.

[0064] According to the method recorded in the national standard "Polyisocyanurate Products for Thermal Insulation" with the standard number GB / T25997-2010, th...

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Abstract

The invention provides a modified polystyrene heat insulation material. The polystyrene heat insulation material comprises polystyrene, polyisocyanurate and a foaming agent, wherein the weight ratio of the polystyrene to the polyisocyanurate is (1-10):1, and the weight ratio of the foaming gent to the polystyrene is (4%-10%):1. The modified polystyrene heat insulation material provided by the invention comprises the polyisocyanurate, the polyisocyanurate is wrapped on the surface of polystyrene particles, and the modified polystyrene heat insulation material is obtained after foaming. The polyisocyanurate has higher flame retardancy and can improve the fire resistance of the modified polystyrene heat insulation material, reduce the heat conductivity of the modified polystyrene heat insulation material and improve the heat insulation performance of the material; and the polyisocyanurate can further increase the binding force among the polystyrene particles and improve the strength of the obtained modified polystyrene heat insulation material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a modified polystyrene insulation material and a preparation method thereof. Background technique [0002] External wall insulation system consists of insulation layer, protective layer and fixing materials (adhesives, anchors, etc.) and is suitable for the general term of non-load-bearing insulation structures installed on the surface of the external wall. External wall insulation can reduce the impact of cold bridges, and at the same time protect the main wall material from large temperature denaturation stress, which has made a huge contribution to building energy saving. It is currently the most widely used energy-saving technical measure in building wall energy-saving in my country , It is also the heat preservation practice vigorously advocated by the state. [0003] At present, there are mainly the following types of external thermal insulation systems used in m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L75/08C08J9/14
Inventor 邓刚彭绵广彭文杰
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD